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The reaction between aluminium and steam

Like the reaction between magnesium and water, it is possible to react aluminium with steam. However, the aluminium oxide produced forms a barrier on the surface of the aluminium which prevents further reaction.

Aluminium briefly reacts with steam as a protective oxide barrier is produced preventing any more reaction

When aluminium reacts with steam, the products are aluminium oxide and hydrogen gas. 

Aluminium + Steam Aluminium oxide + Hydrogen
2Al + 3H2O Al2O3 + 3H2

 

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